Window fastener



B. JAHN ET AL WINDOW FASTENER Filed Oct 16. 1924 I7; van zar:

I have the middle ber 24:.

v are governed l wall.

46being thus in the formof a bar 14 in any proper manner so there are five tumblers 35 so- Such tilting movements of the tumblers and controlledby the engagement of the slottedsides 86 with the side wall parts 84 and the engagement of the'locking recess 39 with the keeper-rod 13.

For cooperating with the tumblers 35 the slides 26 have an inwardly directed nose 43 that is supported by aneck 44 of reduced width to pass through the slot or open space 33 between the side parts 31 of the front The body portion 45 of the slide 26 may portion 16 raised relatively to the side portions 4L7, said middle portion longitudinally directed raised platform. The rear end portion or tail 3'? of the upper and also of the lower tumbler is opposed to said body portion 4:5 and the rear edge 48 may be recessed to correspond, as shown. Actually, all of the tumblers. aremade alike. "The slides 26, furthermore, may be provided with other rib-like enlargements 49 at the middle and. on each side of the cross-slot 28 and adjacent the contact points with the operating wings 27 and 29 of the trip memis secured to the sashas to be rigidly held in position, as by means of lugs 50 that are secured to the rear faces of the The keeper-rod 13 same.

All of the parts that are necessary for locking have been described and these parts are sufficient to permit of unlocking under ordinary or normal conditions.

In the. position shown in Fig.

ly from the divided front wall of the housing, the lower slide being withdrawn inwardly into the interior of the housing,and

the upper slide is projected outwardly or forwardly so that the nose s3 is outside the housing. Also, theside wallparts 3d of the housing and the recesses 36 of the tumone upon the other and these are 7 there may be 6 the tu1n-' blers are inclined downwardly'and outward- V that the fastener permits of relative oneway movement of the sashes freely, but prevents reverse movement. Thus, cons dering the position of the parts as shown in Fig. 6, if free so far the sashes are concerned, the fastener structure can be freely moved downwardly alongthe rod 13 but will hold in the reverse direction. The tumblers will act as one-way or ratchet devices. This permits of manipulating the upper sash from the lower sash for par" tially or fully closing the same bylcorresponding to and sash. This dows. and obviates the need of the use of a long pole formoving the upper. sash.

' Under special conditions or certain critical conditions that may occur with the parts in the fully locked condition we find-that as to prevent free and easy unlocking. The effect of this tendency we have overcome in the following manner Intermediate the bottom wall or'base 30 and the top face 17 of the top cross-bar 18 of the lower sash 11 there is interposed a sub base 51 that is secured in positionby means ofthe screws 52 and a leaf-spring53, the latter being between the two bases. The

pairs and the pair adjacent the rear end.

57 of the housing 20 areshorter than the pair adjacent the front or divided end wall34.

Thus the housing is normally positioned at an inclination to the face 17 of the sashbar 18, with the front end portion 58 higher than the rear end port-ion 57.

The structure described permits of a slight though appreciable yielding of the housing, such; as to permit-of overcoming the jammed or b nding condition mentioned.

'Vvith the partsin the positon of Fig. 6

is an advantage with high winfro movements of the lower a tendency to jam or bind, so

tendency of the spring 53 is to elevate'the and under the described jammed conditions,-

, turning the tripping-bar 19 operates to efiect a rocking of thehousing 20 momentarily so' that the. relations of the individualparts are disturbed so as to free the parts.

.VVe claim as our invention 1. In a window fastener comprising a rod for the upper sash and a fastener structure for the lower sash having a set of tum 'blers for engaging with said rod, a housing supported by the side walls of'said housingand operatively supporting said tripping member.

2. In a window fastener structure for use I in combination with an upper and a lower sash of a window, a rod for being mounted tively to said lower sash.

along the face of said upper sash, a fastener having means for gripping said rod and having a base, a sub-base mounted on said lower sash, a spring tending to separate said base and sub-base, such separation.

3. In combination in a window fastener,

a rod for the upper sash, a fastener structure having tumblers for engaging said rod and mechanism for manipulating said tumblers, and means for supporting said fastener structure from the lower sash, said means comprising a spring for permitting of limited rocking of the fastener structure rela- 4. In a window fastener for use with an upper and a lower sash comprising a vertically directed rod on the upper sash and a sash and provided and means for limiting housing mounted on the lower sash, mecha* nism supported by sald housing comprlslng tumblers, that are operative to'lock with said rod when directed at an inclination thereto,

means for supporting said tumblers that serve to permit of shifting the inclination from one side to the other operating said means. a

5. Ina window structure, lower sash,fa pair each side of said uppersash, a fastener for each of said rods mountedon ,saidlower with mechanism for cooperating with the an upper and a of rods mounted one on adjacent rod, said me'cha side of the hon-j zontal, and a bar extending laterally from said housing serving as a tripping device for nism having moving parts for being shifted a V for changing the operative'relations of saidfasteners and rods,

and a single rod serving as the means for effecting such shifting of said moving parts.

side of the upper sash, gripping devices on the lower sash traversing said rods and 6. Awindow sash controlling mechanism lncluding in combination rods, one on each adapted to be setto grip the rods to prevent either relative upward movement or relative downwardmovement of the lower sash while permlttlng free posite direction, said gripping devices being operatively connected to work always to gether in one direction or the other.

BERTHOLD 'JAHN. I ERNEST E. KAHL.

movement invthe op- 

